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Prabhakar Kushwaha 5c05508971 armv8/fsl-lsch3: Support 256M mem split for MC & dbg-srvr 
The agreed split of the top of memory is 256M for debug server and 256M
 for MC. This patch implements the split.

 In addition, the MC mem must be 512MB aligned, so the amount of memory
 to hide must be 512MB to achieve that alignment.

Signed-off-by: Stuart Yoder <stuart.yoder@freescale.com>
Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
 		2015-07-20 11:44:36 -07:00
..
Kconfig kconfig: armv8: move CONFIG_ARM64 to Kconfig 2014-09-16 12:24:00 -04:00
MAINTAINERS Add board MAINTAINERS files 2014-07-30 08:48:06 -04:00
Makefile ARMv8/ls2085a_emu: Add LS2085A emulator and simulator board support 2014-07-04 19:48:41 +02:00
README armv8/ls2085a: Expose all DDR region(s) to Linux 2015-07-20 11:44:35 -07:00
ddr.c ARMv8/LS2085A: Enable auto precharge for DP-DDR 2015-02-24 13:09:22 -08:00
ddr.h ARMv8/ls2085a_emu: Enable DP-DDR as standalone memory block 2014-09-25 08:36:18 -07:00
ls2085a.c armv8/fsl-lsch3: Support 256M mem split for MC & dbg-srvr 2015-07-20 11:44:36 -07:00

README 

Freescale ls2085a_emu

This is a emulator target with limited peripherals.

Memory map from core's view

0x00_0000_0000 .. 0x00_000F_FFFF	Boot Rom
0x00_0100_0000 .. 0x00_0FFF_FFFF	CCSR
0x00_1800_0000 .. 0x00_181F_FFFF	OCRAM
0x00_3000_0000 .. 0x00_3FFF_FFFF	IFC region #1
0x00_8000_0000 .. 0x00_FFFF_FFFF	DDR region #1
0x05_1000_0000 .. 0x05_FFFF_FFFF	IFC region #2
0x80_8000_0000 .. 0xFF_FFFF_FFFF	DDR region #2

Other addresses are either reserved, or not used directly by u-boot.
This list should be updated when more addresses are used.

Booting Linux flavors which do not support 48-bit VA (< Linux 3.18)
-------------------------------------------------------------------
One needs to use appropriate bootargs to boot Linux flavors which do
not support 48-bit VA (for e.g. < Linux 3.18) by appending mem=2048M, as shown
below:

=> setenv bootargs 'console=ttyS1,115200 root=/dev/ram
   earlycon=uart8250,mmio,0x21c0600,115200 default_hugepagesz=2m hugepagesz=2m
   hugepages=16 mem=2048M'